TempoLife › Calorie database › Vegetables › Tomato
Tomato calories and nutrition facts
100 grams of tomato contains 18 calories, with 0.9 g of protein, 3.9 g of carbohydrate and 0.2 g of fat. It provides 1.2 g of fiber and 2.6 g of sugar per 100 g. Most of its calories come from carbohydrate.
A tomato is 94% water and one of the cheapest flavour-per-calorie deals in the kitchen. Cooking concentrates it — passata and sun-dried tomatoes are the same food with the water progressively removed and the numbers multiplied accordingly. Log fresh ones casually; log the sun-dried jar carefully, mostly for its oil.
Where the calories come from
Protein 17% Carbs 74% Fat 9%
How tomato compares
Per 100 g, against the closest vegetables in this database.
| Food | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|
| Tomato | 18 kcal | 0.9 g | 3.9 g | 0.2 g |
| Cherry tomato | 18 kcal | 0.9 g | 3.9 g | 0.2 g |
| Celery, boiled | 18 kcal | 0.8 g | 4 g | 0.2 g |
| Celtuce | 18 kcal | 0.9 g | 3.7 g | 0.3 g |
| Green sweet pepper, canned | 18 kcal | 0.8 g | 3.9 g | 0.3 g |
Same food, different preparation
| Preparation | Calories | Protein | Fat |
|---|---|---|---|
| Tomato (typical) | 18 kcal | 0.9 g | 0.2 g |
| Canned tomato (canned) | 24 kcal | 1.1 g | 0.2 g |
Per 100 g. Water loss in cooking concentrates calories; added fat in frying adds its own.
Nutrition facts for tomato
| Nutrient | Per 100 g | Per 1 medium tomato |
|---|---|---|
| Calories | 18 kcal | 22 kcal |
| Protein | 0.9 g | 1 g |
| Carbohydrate | 3.9 g | 5 g |
| Fat | 0.2 g | 0 g |
| Fiber | 1.2 g | 1 g |
| Sugar | 2.6 g | 3 g |
| Saturated fat | 0 g | 0 g |
| Salt | 0 g | 0 g |
Print an EU-style nutrition label for tomato — per 100 g and per portion.
Vitamins and minerals in tomato
Per 100 g, highest share of the Daily Value first. %DV = the adult Daily Value (FDA reference). USDA reference data — not medical advice.
| Nutrient | Per 100 g | %DV |
|---|---|---|
| Vitamin C | 13.7 mg | 15% |
| Copper | 0.06 mg | 7% |
| Vitamin K | 7.9 µg | 7% |
| Potassium | 237 mg | 5% |
| Manganese | 0.11 mg | 5% |
| Vitamin B6 | 0.08 mg | 5% |
| Vitamin A | 42 µg | 5% |
| Niacin (B3) | 0.59 mg | 4% |
See the richest foods per nutrient in the nutrient toplists.
Calories in common tomato servings
How many calories in a portion of tomato — reference serving estimates with the gram weight shown.
| Serving | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|
| 1 slice, thin/small (15 g) | 2.7 kcal | 0.1 g | 0.6 g | 0 g |
| 1 slice, medium (20 g) | 3.6 kcal | 0.2 g | 0.8 g | 0 g |
| 1 slice, thick/large (27 g) | 4.9 kcal | 0.2 g | 1.1 g | 0.1 g |
| 100 g (100 g) | 18 kcal | 1 g | 4 g | 0 g |
| 1 cup, chopped or sliced (180 g) | 32 kcal | 2 g | 7 g | 0 g |
Log tomato in one tap
TempoLife lets you search this food, pick your portion and save it to a private daily diary — or snap a photo of the whole meal and edit the estimate. Free to start.
Frequently asked questions
How many calories are in tomato?
Tomato has 18 calories per 100 grams. A typical serving of 1 medium tomato (123 g) has about 22 calories.
How much protein is in tomato?
Tomato contains 0.9 g of protein per 100 g, or about 1 g per 1 medium tomato.
How much sugar is in tomato?
Tomato contains 2.6 g of sugar per 100 g. Nutrition values are reference figures; brands and preparation change the real amount, so weigh and log what you actually eat.
Is tomato low in carbs?
Yes by the numbers: Tomato has 3.9 g of carbohydrate per 100 g. People following low-carb or keto approaches often include foods in this range — portion size and your own plan still decide.
Is tomato low in calories?
Compared with other vegetables it is: 18 kcal per 100 g versus a category median of 32 kcal.
Are these tomato calories exact?
No. These are per-100-gram reference values from the USDA FoodData Central SR Legacy source family. Portion size, ripeness, cut and cooking method all change the real number, so treat them as an estimate and log your own portion.
Related foods
Source: USDA FoodData Central SR Legacy #170457 (2018-04 release). US Government work — public domain in the United States. Reference values per 100 g edible portion.
